Transmission characteristics of W-band millimeter wave in the clear atmosphere

被引：0

作者：

Li X. ^{[1
,2
,3
]}

Liu J. ^{[1
,2
]}

Dong Y. ^{[3
]}

Wu J. ^{[3
]}

Liu H. ^{[3
]}

机构：

[1] Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei

[2] Branch School of Science Island, University of Science and Technology of China, Hefei

[3] Science and Technology on Optical Radiation Laboratory, Beijing

来源：

Harbin Gongye Daxue Xuebao/Journal of Harbin Institute of Technology | 2019年 / 51卷 / 09期

关键词：

Atmosphere transmission; H[!sub]2[!/sub]O; Millimeter wave; O[!sub]3[!/sub; The Line-by-Line method;

D O I：

10.11918/j.issn.0367-6234.201806035

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

In order to investigate the attenuation effect of clear atmosphere on millimeter wave signals, the gases contributing the most to millimeter wave absorption in the atmosphere were analyzed based on HITRAN 2008 database of atmospheric molecular absorption spectroscopy parameters. A fine calculation model of the absorption of molecular spectral lines in the far wing was obtained by utilizing the Gross dynamic line. Based on this model, the physical property parameters and absorption spectrum of 6 primary absorbing gases including H2O, O2, and O3 were calculated using the Line by Line method. Then, attenuation effects of atmosphere on millimeter wave were analyzed in both homogeneous and inhomogeneous path, respectively. Results calculated by the Line-by-Line method agreed well with the results calculated by the Liebe model method. In addition, compared with 94 GHz test system measurement data, the relative deviation was 3.7%. H2O and O2 strongly attenuated the millimeter wave signal in the 75-110 GHz millimeter wave band, accounting for more than 95% of the total gas attenuation. When the millimeter wave signal was transmitted horizontally at about 20 km, the attenuated effect of O3 on the signal should be considered, and the attenuated effect of CH4, CO, N2O was negligible. The research results can provide reference for the engineering application of millimeter wave radar parameter design. © 2019, Editorial Board of Journal of Harbin Institute of Technology. All right reserved.

引用

页码：43 / 48

页数：5

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